code: def iter_setup(self):
      data = self.iterator.next()
      self.feed_input(self.data, data, layout=self.layout)
  
imports: import numpy
  import nvidia.dali
  import nvidia.dali.fn
  import nvidia.dali.math
  import nvidia.dali.ops
  import nvidia.dali.types
  from nvidia.dali import Pipeline, pipeline_def
  from nvidia.dali.backend_impl import TensorListGPU
  from nose_utils import assert_raises
  from test_utils import RandomlyShapedDataIterator, generator_random_axes_for_3d_input, generator_random_data, as_array
label_desc: Use image node_id 3 for calling the PadSynthDataPipeline obj's underlying member method code with example usage: obj.iter_setup() without return types